I am still using, in a second system, a pair of Infinity Modulus satellites I purchased in 1992, with the original, very heavy Infinity stands. These stand-mount speakers were used with the Infinity Servo-Subwoofer for many years, although it is no longer operating and I now use a Definitive Technology Supercube 6000 with them. The mid-range/“woofer” is, I believe, 5 & 1/4 inches in diameter and there is an Infinity EMIT-k tweeter. They still provide excellent close-field sound for my office. Their $1,300 retail price when introduced in 1990 would be about $3,150 today.
also, in the late 1970s and early 1980s, I had a pair of quite small ADS300 speakers that were absolutely stunning for their size. In a darkened room, you would conclude that a much larger speaker was reproducing the music.